Kind of dumb spot but 4bet/Folding is out of question, if you 4bet then you should also be planning to go broke. Neither calling ain't the best option to turn it into multiway and then when hitting a TP might be difficult to get away vs those guys.

CO range most likely ain't strong but I'd be worried about MP range. So either way it's fine I would say and folding without information most likely safer while you haven't invest much into the pot.